Failure of Autophagy and Lysosomes Exacerbates β-cell Dysfunction and Death Under Hypoxic Stress

Zou, Peter Yuanjie; Tang, Benny; Tang, Mei; Luciani, Dan S.

doi:10.1016/j.jcjd.2018.08.037

Cited by 1 publication

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“…Under the hypoxia, cells form autophagy‐lysosome which can degrade macromolecular substance in the cytoplasm (such as proteins and RNA, and excessive glycogen storage) and some cell's endogenous substrates (including damaged organelles) to realize recycling. This process can maintain the stability of cells themselves, so as to realize the metabolism of the cell and some organelles 11,12 . Hypoxia‐inducible factor 1 (HIF‐1α) is an essential transcription factor activated in hypoxia environment, and its oxygen‐regulated subunit HIF‐1α regulates the expression of chemotherapeutic resistance gene MDR1, which has received increasing attention.…”

Section: Introductionmentioning

confidence: 99%

“…This process can maintain the stability of cells themselves, so as to realize the metabolism of the cell and some organelles. 11 , 12 Hypoxia‐inducible factor 1 (HIF‐1α) is an essential transcription factor activated in hypoxia environment, and its oxygen‐regulated subunit HIF‐1α regulates the expression of chemotherapeutic resistance gene MDR1, which has received increasing attention. Under hypoxia, tumour cells can improve their ability to adapt to hypoxia through a series of biological behaviours, among which HIF‐1α and autophagy are more important.…”

Section: Introductionmentioning

confidence: 99%

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Autologous blood transfusion promotes autophagy and inhibits hepatocellular carcinoma progression through HIF‐1α signalling pathway

Bai

Liu

Cui

et al. 2023

J Cellular Molecular Medi

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To explore the molecular mechanism of autologous blood transfusion promoting autophagy of hepatocellular carcinoma (HCC) cells and inhibiting the HCC progression through HIF‐1α signalling pathway. This is a research paper. Rat hepatocellular carcinoma model and HepG2 cell model were built. The rats with HCC were conducted a surgery, and their blood was collected for detection to detect the recurrence and metastasis of the rats. Western blot was used to analysed the expression of HIF‐1α, TP53, MDM2, ATG5 and ATG14 protein. The apoptosis rate of HepG2 cells was detected by flow cytometry, and autophagosomes were observed by transmission electron microscopy. HIF‐1α expression was measured by immunofluorescence assay. The expressions of HIF‐1α, TP53, MDM2, ATG5 and ATG14 protein were highest in model + autoblood group compared with the model group. HIF‐1α content of model group was higher, but content of TP53, MDM2, ATG5 and ATG14 in the model group is the second. The highest apoptosis rate was found in HepG2 + autoblood group. The number of autophagosomes in HepG2 + autoblood was obviously larger than that of HepG2 + autoblood + inhibitor. HIF‐1α expression of immunofluorescence assay showed that high expression of HIF‐1α was clearly observed in HepG2 and HepG2 + autoblood group from confocal observation. However, there was no HIF‐1α protein expression in HepG2 + autoblood + inhibitor group. The migration rate in HepG2 group, HepG2 + autoblood group and HepG2 + autoblood + inhibitor group was 85.71 ± 7.38%, 14.36 ± 6.54% and 61.25 ± 5.39%, respectively. Autologous blood transfusion promotes autophagy of HCC cells through HIF‐1α signalling pathway, which further inhibits HCC migration and erosion.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%